Tool-post



G. G. PORTER.

TOOL POST.

APPLICATION FILED OCT. 7, i919.

Patented Nov. 8, 1921.

2 SHEETS-SHEET l.

' INVENTOR.

f' [gy/ //zff frda ATTORNEYfv G. G. PORTER.

TOOL POST.

APPLlcAmN FILED 001.7, 1919.

1,896,46 1 Patented Nov. 8, 1921..

2 SHEETS-SHEET 2- INVENTOR.

A TTORNEY PATENT OFFICE.

GEORGE G. PORTER, 0F SYRACUSE, NEW YORK.

TOOL-POST.

Application filed October 7, 1919.

To all whom t may concern.'

Be it known that l, GEORGE G. PORTER, a citizen of the United States, and a resident of Syracuse, in the county of Onondaga and State ,of New York, have invented a certain new and useful T col-Post, of which the following is a specification.

This invention has for its object a particularly rigid simple tool post for engine lathes, in which the tools can be more readily secured than in the ordinary tool post and which will also have an increased capacity for taking larger tools. Another object ot' the invention is to effect a saving in tools by providing a tool post which will hold boring tools or other tools with round shanks as well as the ordinary turning tools or tool holders with square or rect-angular shanks, and without bruising or distorting the shanks of said tools as is done with the tool posts now in use, wherein the end of the tool post screw comes directly in contact with the shank of the tool. A further object of the invention is to provide a tool post in which adjustments of the tool for height, and certain other adjustments can be readily made without releasing the tool from said tool post or disturbing its setting after it has been rigidly secured therein, as will be hereinafter more fully set forth.

The invention consists in the novel features and in the combinations and constructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanying drawings, in which like characters designate corresponding parts in all the views.

Figures 1 and 2 are respectively, a plan view and a. vertical sectional view of a preferable embodiment of this tool post as arranged when used or holding boring tools, Fig. 2 being taken on line 2 2, Fig. 1 and looking in the direction of the arrows.

Fig. l3 is a plan view similar to Fig. 1 showing my tool post arranged when holding a cutting tool for external turning operations.

This tool post comprises generally, a body adjustable about an upright axis, a slide carried by the body and adjustable vertically relatively thereto, the slide being provided with means for holding the tool, and means for holding the body and the slide in their adjust-ed positions.

1 designates the body which is here shown as tubular, that is, it is formed with a cylin- Specification of Letters Patent.

Patented Nov. 8, 1921.

serial No. 329,408.

drical shaped passage 2, and dove-tail vertical ways 3.

4, 5 are discoidal bearings or locating members which fit loosely into the upper and lower ends of the passage 2 and about the axis'of which the body 1 is adjustable, the bearings 4, 5 being here illustrated as being mounted in the counterbored bearings 6 and 7 at the ends ofthe passage 2. The members keep the body in its proper location on top ot' the cross slide 11, and with reference to the clamp bolts 12. The upper disk 4 is formed with a flange 8 overlapping the top face of the body 1. This disk serves as a washer for the bolts 12 and as a clamping member to secure the tool post rigidly to the cross-slide 11.

9 is a base or T nut having two ta ped holes, which fits into the T slot 10 of the 1oss-slide 11 of the tool carriage of a lathe, as will be understood by those skilled in the art.

As here illustrated, the body is secured to the slide 11 by means of threaded studs 12 extending through the disks 4, 5 and threading into the nut 9, and nuts 13 threading on the upper ends of the studs' against the upper disk 4. There are preferably two studs both of which are located out of the axis of the body 1, so as to bring the cutting tool as close as possible to the top of the cross-slide 11.

14 is the slide having a. dovetail way 15 movable in the ways 3 of the body 1, this slide being formed with means for receiving the shank 16 of the tool as a transverse slot or passage 17. It is also formed with means for clamping the shank 16 of the tool, this means being here shown as a clamping member or sliding block 18 movable to clamp the tool 16 by means of screws 19 threading into the member 14 through the top thereof, the screws projecting into the passage 17 and bearing against the upper face of the sliding block or clamping member 18.

This member 18 is moved in the other direction, that is, upwardly away from the tool 16 by means of a tension spring 20 located in suitable alined passages 21, 22 in the slide 14 and the member 18, the opposite ends of the spring` being connected respectively to pins or rods 23, 24 extending transversely through the passages 21 and 22 respectively.

The object of the clamping member 18 is to provide means for keeping the Shanks of in proper positionu for boring.

to end Vordivided longitudinallylby the slot 28, which allows transversely through 1 that portion of ingthe body 1.

the screw comes directly in contact with' the f5 shank of the tool. The block 18 is prefer ably made comparatively thick and is a sliding fit in the slot 17 Awhich `keeps ,it from cramping in the slot 17 even'when it Vrests on the shank of a tool which is heldto one side of the slot as shown in Fig. 3. K

,.32 represents apiece which is held in a lathe in a chuck or other suitable means and The line 33 representsthecenter line et the spindle oi the lathe. 34; indicates apiece turning on `centers in the lathein the usual manner and driven bythe dog 35. 1t is well known to those skilled in the art,

and bends it as shown somewhat exaggerated, in Fig. 11, so thatthe tool is Vreally insecurely held between three viz. the end o'tthe screw and the V block directly underneath. Also when lusing turning tools with rectangular Shanks for taking heavy cuts pivotal points,

.'the'tolsoiten swing around underthe end of the single set screw and result in spoiled Iwork. 1n my tool post, these faults are overcome by using two' set Screws instead of one,

-as shown, which gives thetools ai' much more rigid support thanis possible with'the old style tool post. y

The slideis moved upwardly by means of a screw 25 threading through the lug 26V at the" upper end ot the slide. 14L`fand overhang- The slide 14 is held its adjusted position jby clamping screws 27 eitending transversely through the body andacti'ngtoclamp the walls of the channel or way 3 onto the dovetail way 15V ofthe slide 111.

As hereshown, thebodyvis split from end the screws 27 that extend the body'into the sections thereof` on oppositel sides ot the slot 28;

i body, to bind the body and slide together.

The"V block, as shown in Fig. 2 is used when holding tools with round Shanks. 1t `,can also be turned 'up side down from the dosition `shown and'used as a filler block whenholding very small tools with square Shanks.

When using the with rectangular shanks as filler block 29 is not used.

ordinary turning tools inFig. 3, the But the' tool is and the clamping member 18.

Tool posts ofthe ordinary type, as shown by vFigs@ and `5',`when made for medium size lathes will only hold tools with shanks `25 in the proper Yameter of the they are comparatively loose it in the body VVthe tool.

the bottom of the slot i' boring tool 'from becoming bent and bruised.

Withmy Jtool post made as shown, of proper size for the same lathes, round or rectangulartools having a shank one inch in diameter or width can be used and without the .y shanksof the tools Vbecoming bruised or bent.

`This greatly increases the range of the tool post especially Jfor holding boring tools, vas when itis desirable to bore large holes where a ygreat deal of stock is to be removed and a heavy rigid boring bar is in order, it is Y not necessary to resort to some other method for. holding the tools as is the case with the ordinary tool post.

1n operation, the tool is placed in the passage'17 and held there by the clamping block 18 using the V-block 29 if desirable as previously described. If the cutting lip of the tool is not at the proper height the tool and slide can be raised or lowered by loosening the clamp screws 27 and turning the screw direction until the desired height is obtained. The screws 27 are then tightened to bind the body-and slide together. y

The angular position of the tool is determined by loosening the nuts 13 on the studs 12 and vadjusting the body 1 about the locating members or bearings 4 and 5. TheV dibearings l and 5 is such that not clamped by the clamp so thatf they are hold the slide 14 in its adscrews 27 which justed position. This permits of the slide..

being in proper position for height and secured to the body andV then allowing the angular adjustment to be made about the vertical axis without disturbing they height of As will be seen by those skilled in the'ar't, my tool post can be used -for holding either tools with round or rectangular shanks and tools `for either boring or turningl and will -liold the tools very rigidly so that much Vab'out'lSOo from that shown in Fig. 3, and

usetheturning tool, the cutting end of which would then protrude from. the side 36, in other words, the cutting end of the tool `would befonthe opposite end of the shank from what it is shown in Fig. 3.`

`VVha-t I claim is: v

i 1. 'A tool post comprising a tubular body, a base, disks located'in opposite ends of the tubular body, a screw extending through the disks and into the base, and too-l holding meansE associatedY with -the body, substantially as and for the purpose'described.

y heavier cuts may be taken without causing Y and Vare threaded into onesection ci the 2. A tool post comprising a tubular body, a base, disks located in opposite ends of the tubular body, a screw extending through the disks and into the base, the screw being located eccentric to the axis of the body, and tool holding means associated with the body, substantially as and for the purpose specified.

3. A tool post comprising a tubular body, a base, disks located in opposite ends of the tubular body, a pair of screws extending through the disks and into the base, and tool holding means associated with the body, substantially as and for the purpose set forth.

4. A tool post comprising a tubular body divided longitudinally along one side and formed with vertical ways along one side, the line of division opening through the bottom of the way, disks mounted in opposite ends of the tubular body, a base and means extending through the disks and into the base, a slide adjustable in the ways and having means for holding the tool, and clamping means extending transversely through the body adjacent the ways for clamping. the body onto the slide and holding the slide in its adjusted position, substantially as and for the purpose specied.

5. A tool post comprising a tubular body split longitudinally along one side thereof and formed with vertical Ways along such side, the plane of division opening through the bottom of the way, a base, and means carried by the base and located in the tubular body and about which the tubular body is adjustable, a slide adjustable in the ways and having means for holding the tool and clamping means extending transversely through the body crosswise of the split adjacent the Ways for clamping the body onto the slide and holding the body in position relatively to the base, substantially as and for the purpose described 6. A tool post comprising a tubular body, a slide carried by the body and movable vertically relatively thereto, a base, a bearing member arranged in the tubular body, and means rising from the post and engaging the bearing member, substantially as and for the purposes specified.

7. A tool post comprising a tubular body, a slide carried by the body and adjustable vertically relatively thereto, and having means for holding the tool, disks mounted on opposite ends of the body, a base and clamping means extending through the disks and into the base, substantially as and for the purpose set forth.

In testimony whereof, I have hereunto signed m name at Syracuse, in the county of Onon aga, and State of New York, this 16th day of Sept., 1919.

GEORGE G. PORTER. 

